Citizen Systems iDP3420, iDP3421, iDP3423 9.3.2 Electrical Characteristics

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iDP3420/3421/3423 User’sMa nual

29 CITIZEN

9.3.2 Electrical Characteristics

(1) Input signal level

Allthe input signals are at theTTL level.

"HIGH" level : 2.0 V at minimum

"LOW" level : 0.8 V at maximum

(2) Outputsignal leve l

Allthe output sign als are at the TTL level.

"HIGH" level : 2.4 V at minimum

"LOW" level : 0.4 V at maximum

(3) Input and output conditions

Allthe input signals arepulled up at 3.3 kΩ.

[Printer Side] [Host Side]

Allthe output signals are pulled up at 3.3kΩ.

[Printer Side] [Host Side]

TwistedPair Wire